Author Topic: Exhaust refurb  (Read 1264 times)

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Offline Patrick

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Exhaust refurb
« on: August 25, 2005, 07:04:01 AM »
My '75 CB750K is probably the most beautiful machine on the face of the earth. Men on $40,000 Harleys stop and gaze with awe and envy when I roll past them. Women throw themselves at me, ripping off their blouses and offering to give me a ride if I will give them a ride. Small children cry and beg me to be their daddy.

It can be a real #$%* getting around town.

Anyway, the perfection has a flaw. The exhaust. The blemished exhaust. When I restored my bike over the last winter, thanks in no small measure to the generous advice and encouragement offered by the good folks of this forum, I naval jellied and sanded and buffed the hell out my headers and muffler, but I couldn't make them look good. The tarnish was too deep. The pits too resistant. The pipes are still in good condition, no weak spots or dents, but the shine of the chrome has joined the British Empire in the dimly remembered past. The different being, of course, that the chrome is remembered fondly.

I figured to paint the headers flat black, but there is just enough chrome left to that I figured it would only be a short time before peeling patches would leave my ride looking like it was afflicted with leprosy. Rechroming does not appear to be an option. There is only one place within 200 miles of my home that does rechroming, and the same individual who told me about this plating operation warned me about the piss-poor quality of its work.

Short of buying a new exhaust, which entails spending money, can anyone suggest a good way to prepare the exhaust for paint. Also, what type of paint would work best? What would look good?   

Thanks, in advance, for your continued help.
1970 CB750 K0
1982 VF750S Sabre
1987 VT1100 Shadow
1979 Yamaha XS11
1969 Yamaha DT1B
etc.

MPH2

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Re: Exhaust refurb
« Reply #1 on: August 25, 2005, 09:16:50 AM »
probably sand it with some rough sandpaper so the paint will stick better

bikehenge

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Re: Exhaust refurb
« Reply #2 on: August 25, 2005, 09:38:55 AM »
Patrick,
Congrats on having such a fine piece of equipment, I hope you bring all the thrown blouses/bras/thongs etc to some proper authority like Goodwill for redistribution.

If you use a spray on type of High Temp paint (from your local auto parts store) read the directions carefully.  Often there is a requirement that you install the part and run up to temperature to bake the new finish within a fairly short time of spraying the coating on.  I know of 2-strokers that use Red Devil lye to clean out the inside of headers (since you'll have it off anyway).  It works best with hot (boiling) water and plugged pipes (rubber stoppers from the hardware store).  Watch to see what comes out after 5-10 minutes and repeat until resonably clean.  Dispose of in local Superfund site or your driveway.

I've considered sending headers off to Jet Hott for their semi shiny ceramic coating, but haven't yet so I can't endorse their product, but it sounds good from what I read on their website.

Good luck
Rob

Offline TwoTired

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Re: Exhaust refurb
« Reply #3 on: August 25, 2005, 09:41:53 AM »
Paint doesn't like to adhere to shiny smooth surfaces.  It needs a something to grab on to.  Depending on the paint you intend to use, and it's self leveling properties, scuff the remaining chrome with 220 or 320 grit paper.  Clean well and paint.  A high temp paint is recomended.
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.